Tire-builder&#39;s tool.



C. A. ARNOLD.

TIRE BUILDERS TOOL.

APPLICATION man Aus.25.191s.

1 ,209,536. Patented Dec. 19, 1916.

u PTM@ vor oonzusc'rrcur.

igaoasss SPS Patent y Fatentedlec. 12, 19rd,

Applica-tion ledugustl, 1915. Serial No. 116,234.

To all wiz-0m I? may concern Hartford, in the county of `lfl'artford Aand State of CoimecticutJ have invented certain.

nevi" and usefulv Improvements in Tire, BuildersJ rlools, of which the following is full, clear, and exact description This invention relates to the manufacture of tires and has for an object to provide atool for compacting the treads of. tire car-- casses, v

In the manufacture of tires it is custonoary 'to form the'careass oi layers of fabric laid successively on a ring core, each layer as itis applied being centrally laid under tension' against thev medial portion of the-- core and being then. pressed at the sides against the sides of the core by radiallyrnovn ing stitchers,

The present invention provides a device for rolling down the fabric loyers forcibly into intimate contact with eachv other throughout a zone from the center of the carcass to' points on. the sides Where the stitchers begin to operate.,

The invention. can be readily understood i by reference to the accompanying drawing@v in Which-f- 'I Figure 1 is a side elevation ofthe toolinoperative position, l `ig..2 is an 'enlarged cross-sectional view on the line-2-2,' Fig. 1., Fig. 3 is a'plan view of the tool.

Referring now to the ldrawing' in which like characters of reference designate siniilar parts, 10 designates a ring core of the `usual and Well-known type, the same being carried on achuck 11 which is mounted for rotation on a support 12.

ln carrying out the invention, I provide a lever 13 which is pirated as shown at 14.- upon the support 12 and is terlnirnill)y equipped with a roller 15. A. Ushaped braeket'l is formed integrally with the lever in rear ot the roller 15, the arms of the bracket being spaced suliiciently apart to embrace the ring core. A, pair of rollers 17 are mounted to idle on shafts 18 Whicliare fixed by pins y19 in arms 20 of the ,general irregular shape shown in Figs 1 and 2, these arms having secured thereto respectivepivots 21 which are journaled in the yends oit the arms of the bi'aclret. The rollers 17 are normally held pressed against 'each other between the bracket arms by means-.of heli f pointe on thesides ycal springs ivhich areeonnected to projec-f tions 2 3 that are fixed totlie pivots 21.

The rollers 17 are adapted' to rst bear against the central or medial portion of each fabric layer as it is laidfon the core to fornil the tire carcass-andas the'lever is de pressed the rollers rock on their pivots 21 and move outwardly away from each .1. 'ier in curved paths to conform to the transverse curvature of the core. During this Inovement the rollers gradually press thefabric layerslnto intimate Contact with each other from the center line of the layers outwardly the stitchers will substantially begin 'to oper-n ate.. Eventually the rollery 15 will come into contact with the carcass and thoroughly roll down the central portion of the tread thereof. .When the roller 15 contacts with the csreass, therollers 17 will have reached their outer limit of movement and will have become locked in this .position by dogs 24 that are formed integrally with the projections and are rocked outwardly and lodge on tot of 'angular lerers25 which are pivoted i .r elbows as shown at 2601i the arms ci the brackets 16 and are yieldingly held at the. inner ends against the body .of the' bracket by helical springs27.

. For releasing the rollers, pins 28 are slidablv fitted in the body of 'the bracket 16 and bear with their upper ends'against the un'- derneath faces of the Iinner ends of the anguiar levers 25. The lower ends of the pins 28 project below the bracket and upon the lever gravitating after each operation,are adapted to strike against the Hoor or base of the standard and raise-the innerV ends of the lovers 25 thereby rocking out 'the outer ends so that the dogs 24fare released and the springs 22 permitted to return the rollers 17 to initial position.

In operation, the ring core rotated after each fabric layer is laid, and the operator depresses the lever 13 to force the rollers 17 into intimate Contact l with the plies. The rollers move outwardly upon the carcass, as above stated` and generate concentric zones on-tbe rotating carcass throughout all points et which zones the fabric lavers will be of the layerswhere` back against the fabric when-'the operator When. the rolling mechanism graritates into :inoperative position liponthe opera-tor rere'leases the lever after each operation.

leasing the'lever, the, dogs 24 are vreleased by contact of the pins 2S with the loo'r or base :ofthe standard, and'4 the rollers. 17 are per- -m'tdl to spring .back toxinitialpostion ready-for the next operation. g :140

of rollers adapted to' Contact with. al tire,

ingly holding the rollers ad.

means lfor yiel jacent each other, means for forcing the rollersagainst the tire, and pivots upon which the rollersmoveapart 'in curved paths in conforming tothe surface of the tire.

2; A tirel builders tool comprising 'a pair ofrollers pressed toward each other and adapte toengage the tread' of the tire,

4means for forcing the rollers against the tire, pivots upon which the rollers move apart in curved paths in conforming to the transverse curvature of the' tire, means for .locking the' rollers at their outer limit of movement, andmeansv for releasing said locking means.

Signed at Hartford Ct., this 16 day vof Aug. 1916. v l CLARENCE A. ARNOLD. 

